Lantern



(No Model.)

0. D. WOODRUFF.

LANTBRN.

UNITED STATES PATENT OFFICEe OLIVER DWTIGHT VOODRUFF, OF SOUTHINGTON,CONNECTICUT.

LANTERN.

SPECIFICATION, forming part of Letters Patent No. 408,783, dated August13, 1889.

Application filed March 1 1889. Serial No. 301,690. (No model.)

T0 all' wiz/0722, t may concern- Be itknown that I, OLIVER DWIGHT Woon-RUFF, residing' at Southington, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inLanterns; and I do declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, which form a part of this specification.

My invention relates to an improvement in tubular lanterns, the obj ectbeing to simplify, improve, and cheapen their construction and toincrease their convenience in use over lanterns of this class asheretofore made.

Vith these ends in view my invention consists in a tubular lanternhaving certain details of construction and combinations of parts, aswill be hereinafter described, and pointed out in thev claims.

In the accompanying drawings; Figure l is a view in front elevation of alantern embodying my invention. Fig. 2 is a view thereof in rearelevation, with the upper portion of the lantern shown in verticalcentral section. Fig. 3 is a detached plan view of the perforatedburner-plate. Fig. 4 is an enlarged view, in transverse section, of theguide-tubes which inclose the lifting-spring. Fig'. 5 is a detachedreverse plan view of the globe-cap draft-ch est, and Fig. 6 is adetached View of such parts in vertical section; and Fig. 7 is adetached view of the burner-plate, the guiding-tubes, the loop, and thenotched ear.

The lantern herein shown is provided with a base A, which contains thefou nt, draft-tubes B B, a burner C, and a perforated burnerplate D,having a central opening adapting it to fit over the burner and formingthe lower support for the globe E of the lantern. This plate isautomatically lifted for raising the globe above the burner by means ofa spiral spring F, inclosed within a tube G, depending from its edge andtelescoping in a larger tube l-I, standing-up from the base of thelantern and by preference soldered for strength to the curved lower endof the adjacent drafttube. These two tubes G and H are adapted inthemselves to guide the plate, and hence the globe, as the same arelifted and pulled down by being coupled together, so as to be relativelynon-rotatable. As herein shown, they are adapted to guide the plate andglobe by providing them with corresponding longitudinal corrugations orliutings I, those of one tube being adapted to iit within those of theother, so as to permit the tube attached to the burner-plate totelescope freely in .the tube attached to the base of the lantern, butpreventing the former from rotating within the latter, whereby thevertical movement of the plate and globe is strictly confined to onevertical plane and the use of any other guides for the globe renderedunnecessary.

Instead of fluting or corrugating the tubes, as described, they may beadapted in any other suitable manner to perform the guiding function setforth above, and so dispense with special guiding' attachments or theuse of another set of tclescopin g tubes, as has been heretoforeproposed.

The burner-plate is held in its normallydepressed position against thetension of thc spiral lifting-spring by means of a catch J, consistingof a rigid notched ear depending from the edge of the plate at a pointnear the tube G and having its slotted edge facing such tube, and by along loop K of wire having its loop end uppermost and secured to thebase of the lantern at a point near the tube H, so as to stand in avirtually upright position. Under this construction and arrangement ofparts the loop is readily disengaged from the catch by pressing ittoward the tube H, which serves as a support for the fingers during thisoperation. The lower end of the catch is beveled, so that the catch willautomatically re-engage with the loop when the plate is pulled down bymeans of the finger-piece L, which is rigidly secured to the burnerplate and extends horizontally beyond the edge thereof.

The globe-cap M of the lantern is rigidly secured to the rectangularlower end of a long and narrow draft-chest N, having straight sides andstraight ends and a curved top, which conforms to the outline of thecurved upper ends of the draft-tubes B B,with which the said chestextends parallel. Along rectangular opening leads from the globe-capinto this draft-chest, which greatly promotes the draft of the lantern,which will therefore IOO sustain a larger and a brighter flame than alantern having the ordinary central drafttube.

The globe E is retained in place upon the burner-plate by means ofglobe-retaining devices O and l), while the upper end of the globe issupported and guided in a laterally yielding globe-holder Q, the saiddevices O and I and holder Q having been fully described and claimed byme in an application filed on the 26th day of January, 1889, andtherefore not requiring extended description here.

By adapting the guidetubes to constitute in themselves the guides forthe globe the lantern is much simplified and chcapened, and not onlythat, but also the globe is freed from cumbrous guiding devices, whichare un sight-ly and liable to be injured and deranged in the use of thelantern. The catch and spring for holding the globe down are placedwhere they will not be heated and where they are very convenientlyoperated. The increased draft secured by the draft-chest enables thelantern to sustain a larger and brighter flame, as has been described.

I am aware that a circular draft-chamber into which the upper ends ofthe draft-tubes of a tubular lantern enter is not new. In chambers ofthat form the air is diffused and not moved directly, as in mydraft-chest, which secures better results.

I would have it understood that I do not limit myself to the exactconstruction and arrangement of parts herein shown and described, buthold myself at liberty to make such changes and alterations as fairlyfall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is`

l. In a tubular lantern, the combination, with the base thereof, ofavertically-1novable burner-plate, two teleseoping tubes respectivelysecured to the burner-plate and to the lantern-base and coupled to berelatively nonrotatable, and means for lifting the plate, which isprevented from moving laterally by the coupled tubes, substantially asset forth.

2. A tubular lantern having a movable burner-plate, two telescopingtubes respect ively secured to the plate and to the base of the lanternand constructed. to confine the plate to vertical movement in one plane,a spring for automatically lifting the plate, a catch consisting of anotched ear rigidly secured to and depending from one edge of the plate,and a long loop for engagement with such catch, secured to the base ofthe lantern and standing in a virtually upright position, substantiallyas set forth.

In a tubular lantern, the combination, with the draft-tubes thereof, ofa fixed globe cap located below the curved upper ends of the said tubeand a long narrow draft-chest extending parallel with the said curvedends of the tubes and openinginto them at its up per end and at itslower end into the globecap, substantially as set forth.

4. In a tubular lantern, the combination, with the draft-tubes thereof,of a fixed globecap located below the curved upper ends of the saidtubes, a fixed globe-holder depending below the cap and adapted to havethe upper end of the globe play up and down in it, a globe, anautomatically-lifted burnerplate, and a long narrow draftfchestextending parallel with the said curved ends of the tubes and openingthereinto and interposed between them and the globe-cap, with theinterior of which it communicates through a long narrow opening,substantially as set forth.

In testimony whereof I have signed this specification inthe presence oftwo subscribing witnesses.

OLIVER DWIGHT WOODRUFF.

Witnesses:

Unas. l. SnUnwM, M. S. SULEY.

